Cesium carbonate → methyl 4-(1-(4-(3-methyl-5-(pyrimidin-2-ylamino)phenyl)-1H-pyrazol-1-yl)ethyl)benzoate

Participants

Reaction Conditions

Reaction Steps

A mixture of N-(3-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)pyrimidin-2-amine (100 mg, 0.321 mmol), methyl 4-(1-(4-bromo-1H-pyrazol-1-yl)ethyl)benzoate (139 mg, 0.450 mmol), Pd2(dba)3 (15 mg, 0.016 mmol), X-phos (15 mg, 0.032 mmol), and cesium carbonate (314 mg, 0.964 mmol) was diluted with 1,4-dioxane (3 mL) and water (0.3 mL) at ambient temperature. The mixture was stirred for 5 minutes under a subsurface argon sparge, after which time the mixture was heated to 90° C. and stirred under an argon atmosphere for 2 hours. The reaction mixture was cooled to ambient temperature and diluted with ethyl acetate (100 mL) and water (25 mL). The organic layer was separated and washed with water (25 mL) and then brine (25 mL). The organic layer was dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure to afford the crude product residue. The crude product residue was purified by column chromatography on silica (0-100% [5% methanol in ethyl acetate]/hexanes) to afford methyl 4-(1-(4-(3-methyl-5-(pyrimidin-2-ylamino)phenyl)-1H-pyrazol-1-yl)ethyl)benzoate. MS ESI calcd. for C24H24N5O2 [M+H]+ 414. found 414. 1H NMR (500 MHz, DMSO-d6) δ 9.46 (s, 1H), 8.46 (d, J=4.5 Hz, 2H), 8.24 (s, 1H), 7.91 (d, J=8.0 Hz, 2H), 7.80 (s, 1H), 7.72 (s, 1H), 7.41 (s, 1H), 7.37 (d, J=8.0 Hz, 2H), 7.01 (s, 1H), 6.80 (t, J=5.0 Hz, 1H), 5.76-5.70 (m, 1H), 3.82 (s, 3H), 3.27 (s, 3H), 1.83 (d, J=7.0 Hz, 3H).

Provenance & Evidence